NIPPON GOMU KYOKAISHI
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Volume 73, Issue 11
Displaying 1-8 of 8 articles from this issue
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  • [title in Japanese]
    [in Japanese]
    2000 Volume 73 Issue 11 Pages 573-577
    Published: 2000
    Released on J-STAGE: July 09, 2007
    DOIhttps://doi.org/10.2324/gomu.73.573
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    [in Japanese], [in Japanese]
    2000 Volume 73 Issue 11 Pages 578-585
    Published: 2000
    Released on J-STAGE: July 09, 2007
    DOIhttps://doi.org/10.2324/gomu.73.578
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    [in Japanese], [in Japanese]
    2000 Volume 73 Issue 11 Pages 586-592
    Published: 2000
    Released on J-STAGE: July 09, 2007
    DOIhttps://doi.org/10.2324/gomu.73.586
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    [in Japanese]
    2000 Volume 73 Issue 11 Pages 593-598
    Published: 2000
    Released on J-STAGE: July 09, 2007
    DOIhttps://doi.org/10.2324/gomu.73.593
    JOURNAL FREE ACCESS
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  • Viscoelastic Properties of Rubber Composite and its Adhesive Strength
    Won Woo Lim
    2000 Volume 73 Issue 11 Pages 599-605
    Published: 2000
    Released on J-STAGE: July 09, 2007
    DOIhttps://doi.org/10.2324/gomu.73.599
    JOURNAL FREE ACCESS
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    We studied the effects of temperature and rate on adhesive strength of the cord and rubber composite. The peel strength depended strongly on viscoelastic properties of rubber which relates deeply to temperature and the peeling rate. A master curve of the peel strength was also obtained by applying time-temperature superposition principle on the data obtained under several temperatures Observing fracture surface, some types of fracture were found corresponding to the change of viscoelastic properties of rubber compound.
    The pull-out strength was found to have a similar behavior to the temperature and rate dependencies of the peel strength. Viscoelastic functions could be also applied to the pull-out test.
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  • The Effect of the Cross-Link Density on the Strain Energy Density Function of the Reinforcement Rubber
    Yoshihiro YAMASHITA, Sueo KAWABATA
    2000 Volume 73 Issue 11 Pages 606-611
    Published: 2000
    Released on J-STAGE: July 09, 2007
    DOIhttps://doi.org/10.2324/gomu.73.606
    JOURNAL FREE ACCESS
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    Kawabata et al observed that, in pure rubbers, the degree of cross-link density effects both the first and second term of the strain energy function (W function), as given by
    W(I1, I2)=1/2νkT(I1-3)+ν1.5β(I1, I2)
    where ν is the cross-link density. For reinforced rubbers, the W function was found to given by
    W(I1, I2)=1/2νkT(I1-3)+ν1.5β(I1, I2)+γ(I1, φ, ν)
    where γ is a function representing the effect of reinforcement, and is dependent on both ν and the volume fraction of carbon-black, φ. In this paper, we investigate the effect of cross-link density on the γ function. It is shown that the γ function for the SBR/carbon-black system is
    γ(I1, φ, ν)=A1(φν)1.5•(I1-3)+A2φν2.5•Exp{1.35(I1-3)}
    where A1 and A2 are constants.
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  • Continuous Devulcanization by Shear Flow Stage Reaction Control Technology for Rubber Recycling, Part 8.
    Devulcanization Condition for Peroxide-Crosslinked EPDM and Mechanical Properties of Sulfur-Crosslinked Reclaimed Rubber
    Makoto MOURI, Norio SATO, Hirotaka OKAMOTO, Mitsumasa MATSUSHITA, Kenz ...
    2000 Volume 73 Issue 11 Pages 612-616
    Published: 2000
    Released on J-STAGE: July 09, 2007
    DOIhttps://doi.org/10.2324/gomu.73.612
    JOURNAL FREE ACCESS
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    Continuous devulcanization by the shear flow stage reaction control technology for vulcanized rubbers has been developed. This technology has been applied to sulfur-crosslinked rubbers such as EPDM, NR/SBR (used tire waste) and IIR (used for tube). In this study, this technology has also been applied to peroxide-crosslinked EPDM. The obtained reclaimed rubber was found to be a mixture of two components; one is a linear chain which is soluble in toluene and whose average molecular weight is one third of that of the original raw rubber, and the other is a very loosely crosslinking network whose effective network chain density is about one fiftieth of that of the peroxide-crosslinked virgin rubber. The ratio of linear chain component and loosely crosslinking network component was approximately 3 to 2. The reclaimed rubber can be cured with sulfur- accelerator curing system. The sulfur-crosslinked reclaimed rubber shows good mechanical properties nearly equal to those of sulfur-crosslinked virgin one.
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  • [title in Japanese]
    [in Japanese]
    2000 Volume 73 Issue 11 Pages 618-619
    Published: 2000
    Released on J-STAGE: July 09, 2007
    DOIhttps://doi.org/10.2324/gomu.73.618
    JOURNAL RESTRICTED ACCESS
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